package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = DigestUtils.md5DigestAsHex(employeeLoginDTO.getPassword().getBytes());

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageList(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> employeePage = (Page<Employee>) employeeMapper.pageList(employeePageQueryDTO.getName());

        return new PageResult(employeePage.getTotal(), employeePage.getResult());
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee = Employee.builder()
                .idNumber(employeeDTO.getIdNumber())
                .name(employeeDTO.getName())
                .phone(employeeDTO.getPhone())
                .sex(employeeDTO.getSex())
                .username(employeeDTO.getUsername())
                .password(PasswordConstant.DEFAULT_MD5_PASSWORD)
                .status(StatusConstant.ENABLE)
                .build();

        employeeMapper.add(employee);
    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee findById(Long id) {
        EmployeeDTO employeeDTO = new EmployeeDTO();
        employeeDTO.setId(id);

        return employeeMapper.findByCondition(employeeDTO);
    }

    /**
     * 启用、禁用员工账号
     *
     * @param employee
     */
    @Override
    public void updateStatus(Employee employee) {
        employeeMapper.updateStatus(employee);
    }

    /**
     * 编辑员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void updateInfo(EmployeeDTO employeeDTO) {
        EmployeeDTO dto = new EmployeeDTO();
        dto.setUsername(employeeDTO.getUsername());

        Employee employee = employeeMapper.findByCondition(dto);

        if (employee != null && !employeeDTO.getId().equals(employee.getId())) {
            throw new BaseException("账号已存在");
        }

        employeeMapper.updateInfo(employeeDTO);
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        EmployeeDTO dto = new EmployeeDTO();
        dto.setId(BaseContext.getCurrentId());

        Employee employee = employeeMapper.findByCondition(dto);
        if (!employee.getPassword().equals(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()))) {
            throw new BaseException("旧密码错误，请重新输入");
        }

        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        passwordEditDTO.setNewPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
        employeeMapper.updatePassword(passwordEditDTO);
    }
}
